Carbide soldering torch



Aug. 28, 1923. 1,466,403

. C. KNAPP CARBIDE SOLDERING TORCH Filed June' 22 1922 Patented Aug. 28, 1923..

hair a stares v titans FRED c. KNAPP; or RAI-IWAY, nnw JnssEY.

CARBIDE SOLDERING TORCH.

Application filed June 22,

have invented new and useful Improvements in Carbide Soldering Torches, of which the following is a specification, reference beinghad to the acron'ipan'ying drawings.

This invention is a soldering. torch for the use of plumbers and other mechanics,- and the object is to provide an instrument of this nature which employs calcium carbide and water for the purpose of generating acetylene as a fuel for the torch, the gas being lit by means of a spark struck from a flint or the like. Other objects and advan= tages will be developed in the course of this specification.

In the drawing: Figure lis a vertical section through the torch.

Figure 2 is a detail of the fasteningtor securing the carbide tank to the casing of the torch Figure 3 is a detail of the lighting device. The invention consists of a hollow body or case 1, preferably cylindrical, within which is mounted the water tank 2. The tank 2 i is smaller than the outer casing on all dimensions, and is supported in position within the case 1 by brackets 3, so as to leave intervening gas chambers and pas sages 4 between the two. The tank 2 is entirely enclosed but is provided with a screwcapped filling port 5 at the under side, and this tank is filled by inverting it so as to bring the port 5 uppermost. A needle valve 5 is mounted in the under side of the tank 2 for allowing the water todrip downward as desired. An interiorly threaded sleeve 34; is mounted through the tops of the tank 2 and casing 1, and the valve stem 7 of the valve 6 is threaded at its upper end and passes through the sleeve 34 by means of a threaded engagement therewith indicated at 8. A knob 9 is mounted at the end of the stem 7 for turning same. The outer case 1 is open at its'lower end and a tubular neck 10 is mounted through its top end by means of a threaded engagement 11, and thus an exit is provided for the gas from the pars sages 4-. The usual blow-torch 12 with valve 13 and blast tube 1 1 is rigidly mounted at the top of the neck 10 and therethrough communicates with the gas passages 41:. A transverse slot 15 is cutout at the under 1922. Serial No. 570,120.

Side of'the back end of theme 14, as the.

flint lighter 16 is mounted therein. The lighter is made up-ot a tube 17 supported from the neck 10 by a bracket 18. A serrated wheel 19 is journaled at 20 within a fork 21 at the top of the tube 17, so'that the periphery of the wheel slightly projects laterally through the slot- 15, thus giving a thumb hold'on the wheel. The lower end of the-tube 17 is interiorly threaded to engage a threaded cap 22. supported within the tube l7'and up against the wheel 19 by means of a, coil sprinrg 24 set'within the tube. i

A carbide tank-2.5, open at the top is adapted to be detachably locked to the lower end of the body 1 by forming complementary slide. joints 26 around their respective edges, and mounting lock bolts 27 at opposite sides, same being pivoted at 29 A flint 23 is side,

tothe tank '25. andreleasably engaging the bifurcate brackets 28 on the body 1:.- Thumb screws 30 threadedly engagethe free. ends of the bolts 27. as means for firmly locking the elements together. A. handle 31 is bracketed at 35 to thecase 1, and this handle may be hollow as shown at. 32 and fun nished with a removable cap 33, so that'this hollow handle can be used as a reserve box for carbide.

In use the tank 2 is filled with water and r the tank 25 WltllCiLlblClG. The valve 6 is opened to allow the required amount of water to flow into the tank 25. The gas generated flows up through the passages 4 through the valve 13 into the tube 14. The

operator rotates the wheel 19, the serratedv periphery of which strikes a spark upon the flint 23, through frictional engagement. This spark ignites the gas flowing through thetube 14. By operating the valves 6 and 13 so that more gas is generated than is contom; a blast tube and'valve on the casing and communicating interiorly therewith, the tube having a transverse slot through its under side; a flint lighter supported fromthe casing and including a tube having a forked end extended within the slot, a ser-, rated wheel .journal'ed in the forked end of ,thetube and a flint supported in the tube against the serrated wheel; a substantlally smaller water tank bracketed within the outer cas1ng, and thus forming surrounding gas passageasaid tank having a filling port and an outlet valve in its under side; a

threaded sleeve mounted through the top ends of the inner tank and outer casing; avalve stem controlling the outlet valve n the water tank and passing up through the sleeve and being threaded for engagement ing a casing open at the bottom; a blast tube on the casing and interiorly connected therewith same havlng a transverse slot through its under side; a fllnt 'llghter ope-ratively supported within the slot or" the tube and embodying a serrated wheel pressed against a flint; a relatively small water tank mounted within the casing, same having a filling port and outlet valve in its under side; a valve stem controlling the outlet valve and extended up through the tops of the tank and casing; an open topped carbide tankadapted to detachably' engage the bottom of the casing; and a handle for the casing.

3. An acetylene soldering torch; comprising an enclosed water tank; a substantially larger, open bottomed casing mounted over the Water tank and forming intervening gas passages; a blast tube on the casing and communicating iwith the said gas passages; a flint lighting device mounted in the blast tube; a carbide tank below the casing; means for filling the Water tank; means for admitting Water from the water tank into the carbide tank; and a handle for the apparatus. i v

l In a soldering torch embodying a blast tube having a transverse slot formed therein and employing gas as a fuel, a lighting device therefor comprising a tube having a forked end extended within the slot; a serrated wheel journaled in the forked end or" the tube and protruding laterally; and a flint within the tube and spring pressed against the wheel. Y

5. An acetylene soldering torch comprising separate water and carbide tanks and surrounding casing to form gas passages,- the latter communicating w1th the'carbide tank; a blast tube communicating with the gas passages; means for filling thewater tank, means for admitting Water therefrom intothe carbide tank; and a handle for the apparatus.

I FRED C. KNAPPQ Witnesses: V V p 7 ROBERT L; DUNN,

Gnonen R. HOFFMAN. 

